He tried his best to solve the problem, difficult it was.
#66875
A
no matter what
B
whatever
C
however
D
how
推荐题目
Talk to your teacher and you will get help ________ you have a problem.
#40977
A
unless
B
if
C
until
D
so
_____his father had come, his face lit up.
#74080
A
Having learned
B
When he learned
C
Heating
D
When learning
Tired and disappointed, the rescue team finally reached _____ used to be a village.
#69341
A
where
B
that
C
when
D
what
Tim is in good shape physically he doesn't get much exercise.
#67748
A
if
B
even though
C
unless
D
as long as